Opencv自定義編譯

Question

我試圖減少爲iOS的opencv2.framework大小。我的項目只使用核心，imgproc和highgui模塊。我怎樣才能編譯只有這些模塊？還是有減少尺寸的替代方案？

謝謝。

Answer 1

只需從模塊文件夾中刪除模塊，並從頭文件中刪除包含行。並編譯。在這之前閱讀CMakeLists.txt的依賴關係。

例如，對於highgui模塊;

ocv_define_module(imgproc opencv_core) 

Answer 2

由於v2.4.6的OpenCV有一個自定義Python腳本緩解工作 （plateforms> IOS> build_framework.py）

你只需要在cmake的行添加標誌，以使自定義編譯。

例如：我只需要的lib imgproc，幷包括所有的頭到存檔，我現在的CMake這ressembles：

cmakeargs = ("-GXcode " + 
      "-D BUILD_SHARED_LIBS=OFF "+ 
      "-D BUILD_opencv_core=ON "+ 
      "-D BUILD_opencv_imgproc=ON "+ 
      "-D BUILD_opencv_world=ON "+ 
      "-D BUILD_opencv_gpu=OFF "+ 
      "-D BUILD_opencv_calib3d=OFF "+ 
      "-D BUILD_opencv_contrib=OFF "+ 
      "-D BUILD_opencv_features2D=OFF "+ 
      "-D BUILD_opencv_flann=OFF "+ 
      "-D BUILD_opencv_highgui=OFF "+ 
      "-D BUILD_opencv_legacy=OFF "+ 
      "-D BUILD_opencv_ml=OFF "+ 
      "-D BUILD_opencv_nonfree=OFF "+ 
      "-D BUILD_opencv_objdetect=OFF "+ 
      "-D BUILD_opencv_photo=OFF "+ 
      "-D BUILD_opencv_stitching=OFF "+ 
      "-D BUILD_opencv_video=OFF "+ 
      "-D BUILD_opencv_videostab=OFF "+ 
      "-DCMAKE_BUILD_TYPE=Release " + 
      "-DCMAKE_TOOLCHAIN_FILE=%s/platforms/ios/cmake/Toolchains/Toolchain-%s_Xcode.cmake " + 
      "-DCMAKE_INSTALL_PREFIX=install") % (srcroot, target) 

不要忘記補充核心和世界LIB爲他們是強制性的。 執行python腳本> profite。

之後，手動將lib添加到您的項目中，並刪除標題> opencv.hpp中留下的麻煩的導入標題，你應該很好去！

Answer 3

我現在遇到3.1版本的這個問題，nebuto的答案是接近的，但到目前爲止還沒有完成。通過更新build_framework.py文件，以下能夠產生所需的結果。

def getCMakeArgs(self, arch, target): 
    args = [ 
     "cmake", 
     "-GXcode", 
     "-DBUILD_SHARED_LIBS=OFF", 
     "-DBUILD_opencv_core=ON", 
     "-DBUILD_opencv_imgcodecs=OFF", 
     "-DBUILD_opencv_imgproc=ON", 
     "-DBUILD_opencv_world=OFF", 
     "-DBUILD_opencv_gpu=OFF", 
     "-DBUILD_opencv_calib3d=OFF", 
     "-DBUILD_opencv_contrib=OFF", 
     "-DBUILD_opencv_features2D=OFF", 
     "-DBUILD_opencv_flann=OFF", 
     "-DBUILD_opencv_highgui=ON", 
     "-DBUILD_opencv_legacy=OFF", 
     "-DBUILD_opencv_ml=OFF", 
     "-DBUILD_opencv_nonfree=OFF", 
     "-DBUILD_opencv_objdetect=OFF", 
     "-DBUILD_opencv_photo=OFF", 
     "-DBUILD_opencv_stitching=OFF", 
     "-DBUILD_opencv_video=OFF", 
     "-DBUILD_opencv_videoio=OFF", 
     "-DBUILD_opencv_videostab=OFF", 
     "-DAPPLE_FRAMEWORK=ON", 
     "-DCMAKE_INSTALL_PREFIX=install", 
     "-DCMAKE_BUILD_TYPE=Release", 
    ] 
    return args 

此更新還包括兩個看起來在2.4.6中不存在的新模塊。

對於一些額外的節省，您可能會刪除位於文件底部的模擬器構建的i386設置。如果您的應用程序是iOS 9或更高版本，並且您希望省略32位設備，則也可以取出armv7選項。

b = Builder(args.opencv, args.contrib, 
    [ 
     ("armv7", "iPhoneOS"), 
     ("armv7s", "iPhoneOS"), 
     ("arm64", "iPhoneOS"), 
     #("i386", "iPhoneSimulator"), 
     ("x86_64", "iPhoneSimulator"), 
    ]) 
b.build(args.out)